ep_mem.v

已经在xilinx的ML555开发板上实现的PCIEx4的设计

      .INIT_28(256'h0000000000000000000000000000000000000000000000000000000000000000),
      .INIT_29(256'h0000000000000000000000000000000000000000000000000000000000000000),
      .INIT_2A(256'h0000000000000000000000000000000000000000000000000000000000000000),
      .INIT_2B(256'h0000000000000000000000000000000000000000000000000000000000000000),
      .INIT_2C(256'h0000000000000000000000000000000000000000000000000000000000000000),
      .INIT_2D(256'h0000000000000000000000000000000000000000000000000000000000000000),
      .INIT_2E(256'h0000000000000000000000000000000000000000000000000000000000000000),
      .INIT_2F(256'h0000000000000000000000000000000000000000000000000000000000000000),
      .INIT_30(256'h0000000000000000000000000000000000000000000000000000000000000000),
      .INIT_31(256'h0000000000000000000000000000000000000000000000000000000000000000),
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      .INIT_36(256'h0000000000000000000000000000000000000000000000000000000000000000),
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      .INIT_3A(256'h0000000000000000000000000000000000000000000000000000000000000000),
      .INIT_3B(256'h0000000000000000000000000000000000000000000000000000000000000000),
      .INIT_3C(256'h0000000000000000000000000000000000000000000000000000000000000000),
      .INIT_3D(256'h0000000000000000000000000000000000000000000000000000000000000000),
      .INIT_3E(256'h0000000000000000000000000000000000000000000000000000000000000000),
      .INIT_3F(256'h0000000000000000000000000000000000000000000000000000000000000000),
      .INIT_40(256'h0000000000000000000000000000000000000000000000000000000000000000),
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      .INIT_42(256'h0000000000000000000000000000000000000000000000000000000000000000),
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      .INIT_45(256'h0000000000000000000000000000000000000000000000000000000000000000),
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      .INIT_47(256'h0000000000000000000000000000000000000000000000000000000000000000),
      .INIT_48(256'h0000000000000000000000000000000000000000000000000000000000000000),
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      .INIT_4A(256'h0000000000000000000000000000000000000000000000000000000000000000),
      .INIT_4B(256'h0000000000000000000000000000000000000000000000000000000000000000),
      .INIT_4C(256'h0000000000000000000000000000000000000000000000000000000000000000),
      .INIT_4D(256'h0000000000000000000000000000000000000000000000000000000000000000),
      .INIT_4E(256'h0000000000000000000000000000000000000000000000000000000000000000),
      .INIT_4F(256'h0000000000000000000000000000000000000000000000000000000000000000),
      .INIT_50(256'h0000000000000000000000000000000000000000000000000000000000000000),
      .INIT_51(256'h0000000000000000000000000000000000000000000000000000000000000000),
      .INIT_52(256'h0000000000000000000000000000000000000000000000000000000000000000),
      .INIT_53(256'h0000000000000000000000000000000000000000000000000000000000000000),
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      .INIT_55(256'h0000000000000000000000000000000000000000000000000000000000000000),
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      .INIT_59(256'h0000000000000000000000000000000000000000000000000000000000000000),
      .INIT_5A(256'h0000000000000000000000000000000000000000000000000000000000000000),
      .INIT_5B(256'h0000000000000000000000000000000000000000000000000000000000000000),
      .INIT_5C(256'h0000000000000000000000000000000000000000000000000000000000000000),
      .INIT_5D(256'h0000000000000000000000000000000000000000000000000000000000000000),
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      .INIT_5F(256'h0000000000000000000000000000000000000000000000000000000000000000),
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      .INIT_61(256'h0000000000000000000000000000000000000000000000000000000000000000),
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      .INIT_6C(256'h0000000000000000000000000000000000000000000000000000000000000000),
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      .INIT_72(256'h0000000000000000000000000000000000000000000000000000000000000000),
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      .INIT_77(256'h0000000000000000000000000000000000000000000000000000000000000000),
      .INIT_78(256'h0000000000000000000000000000000000000000000000000000000000000000),
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      .INIT_7B(256'h0000000000000000000000000000000000000000000000000000000000000000),
      .INIT_7C(256'h0000000000000000000000000000000000000000000000000000000000000000),
      .INIT_7D(256'h0000000000000000000000000000000000000000000000000000000000000000),
      .INIT_7E(256'h0000000000000000000000000000000000000000000000000000000000000000),
      .INIT_7F(256'h0000000000000000000000000000000000000000000000000000000000000000),

      // The next set of INITP_xx are for the parity bits
      .INITP_00(256'h0000000000000000000000000000000000000000000000000000000000000000),
      .INITP_01(256'h0000000000000000000000000000000000000000000000000000000000000000),
      .INITP_02(256'h0000000000000000000000000000000000000000000000000000000000000000),
      .INITP_03(256'h0000000000000000000000000000000000000000000000000000000000000000),
      .INITP_04(256'h0000000000000000000000000000000000000000000000000000000000000000),
      .INITP_05(256'h0000000000000000000000000000000000000000000000000000000000000000),
      .INITP_06(256'h0000000000000000000000000000000000000000000000000000000000000000),
      .INITP_07(256'h0000000000000000000000000000000000000000000000000000000000000000),
      .INITP_08(256'h0000000000000000000000000000000000000000000000000000000000000000),
      .INITP_09(256'h0000000000000000000000000000000000000000000000000000000000000000),
      .INITP_0A(256'h0000000000000000000000000000000000000000000000000000000000000000),
      .INITP_0B(256'h0000000000000000000000000000000000000000000000000000000000000000),
      .INITP_0C(256'h0000000000000000000000000000000000000000000000000000000000000000),
      .INITP_0D(256'h0000000000000000000000000000000000000000000000000000000000000000),
      .INITP_0E(256'h0000000000000000000000000000000000000000000000000000000000000000),
      .INITP_0F(256'h0000000000000000000000000000000000000000000000000000000000000000)
   ) ep_io_mem (
      .DOA(a_rd_d_o_0[31:0]),      // 32-bit A port data output
      .DOB(b_rd_d_o_0[31:0]),      // 32-bit B port data output
      .DOPA(),    // 4-bit A port parity data output
      .DOPB(),    // 4-bit B port parity data output
      .ADDRA({1'b0,a_rd_a_i_0[8:0],6'b0}),  // 16-bit A port address input
      .ADDRB({1'b0,b_wr_a_i_0[8:0],6'b0}),  // 16-bit B port address input
      .CLKA(clk_i),     // 1-bit A port clock input
      .CLKB(clk_i),     // 1-bit B port clock input
      .DIA(32'b0),       // 32-bit A port data input
      .DIB(b_wr_d_i_0[31:0]),       // 32-bit B port data input
      .DIPA(4'b0000),     // 4-bit A port parity data input
      .DIPB(4'b0),     // 4-bit B port parity data input
      .ENA(a_rd_en_i_0),       // 1-bit A port enable input
      .ENB(b_rd_en_i_0),       // 1-bit B port enable input
      .REGCEA(1'b1), // 1-bit A port register enable input
      .REGCEB(1'b1), // 1-bit B port register enable input
      .SSRA(1'b0),     // 1-bit A port set/reset input
      .SSRB(1'b0),     // 1-bit B port set/reset input
      .WEA(4'b0),       // 4-bit A port write enable input
      .WEB({b_wr_en_i_0, b_wr_en_i_0, b_wr_en_i_0, b_wr_en_i_0})        // 4-bit B port write enable input
   );


   RAMB36 #(
      .DOA_REG(1),  // Optional output registers on A port (0 or 1)
      .DOB_REG(1),  // Optional output registers on B port (0 or 1)
      .INIT_A(36'h000000000),  // Initial values on A output port
      .INIT_B(36'h000000000),  // Initial values on B output port
      .RAM_EXTENSION_A("NONE"),  // "UPPER", "LOWER" or "NONE" when cascaded
      .RAM_EXTENSION_B("NONE"),  // "UPPER", "LOWER" or "NONE" when cascaded
      .READ_WIDTH_A(36),  // Valid values are 1, 2, 4, 9, 18, or 36
      .READ_WIDTH_B(36),  // Valid values are 1, 2, 4, 9, 18, or 36
      .SIM_COLLISION_CHECK("ALL"),  // Collision check enable "ALL", "WARNING_ONLY",
                                    //   "GENERATE_X_ONLY" or "NONE
      .SRVAL_A(36'h000000000), // Set/Reset value for A port output
      .SRVAL_B(36'h000000000),  // Set/Reset value for B port output
      .WRITE_MODE_A("WRITE_FIRST"),  // "WRITE_FIRST", "READ_FIRST", or "NO_CHANGE
      .WRITE_MODE_B("WRITE_FIRST"),  // "WRITE_FIRST", "READ_FIRST", or "NO_CHANGE
      .WRITE_WIDTH_A(36),  // Valid values are 1, 2, 4, 9, 18, or 36
      .WRITE_WIDTH_B(36),  // Valid values are 1, 2, 4, 9, 18, or 36

      // The following INIT_xx declarations specify the initial contents of the RAM
      .INIT_00(256'h0000000000000000000000000000000000000000000000000000000000000000),
      .INIT_01(256'h0000000000000000000000000000000000000000000000000000000000000000),
      .INIT_02(256'h0000000000000000000000000000000000000000000000000000000000000000),
      .INIT_03(256'h0000000000000000000000000000000000000000000000000000000000000000),
      .INIT_04(256'h0000000000000000000000000000000000000000000000000000000000000000),
      .INIT_05(256'h0000000000000000000000000000000000000000000000000000000000000000),
      .INIT_06(256'h0000000000000000000000000000000000000000000000000000000000000000),
      .INIT_07(256'h0000000000000000000000000000000000000000000000000000000000000000),
      .INIT_08(256'h0000000000000000000000000000000000000000000000000000000000000000),
      .INIT_09(256'h0000000000000000000000000000000000000000000000000000000000000000),
      .INIT_0A(256'h0000000000000000000000000000000000000000000000000000000000000000),
      .INIT_0B(256'h0000000000000000000000000000000000000000000000000000000000000000),
      .INIT_0C(256'h0000000000000000000000000000000000000000000000000000000000000000),
      .INIT_0D(256'h0000000000000000000000000000000000000000000000000000000000000000),
      .INIT_0E(256'h0000000000000000000000000000000000000000000000000000000000000000),
      .INIT_0F(256'h0000000000000000000000000000000000000000000000000000000000000000),
      .INIT_10(256'h0000000000000000000000000000000000000000000000000000000000000000),
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      .INIT_12(256'h0000000000000000000000000000000000000000000000000000000000000000),
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      .INIT_16(256'h0000000000000000000000000000000000000000000000000000000000000000),
      .INIT_17(256'h0000000000000000000000000000000000000000000000000000000000000000),
      .INIT_18(256'h0000000000000000000000000000000000000000000000000000000000000000),
      .INIT_19(256'h0000000000000000000000000000000000000000000000000000000000000000),
      .INIT_1A(256'h0000000000000000000000000000000000000000000000000000000000000000),